Metal shearing device



Jan. 13, 1942. D, PARKER 2,269,914

METAL SHEARING DEVICE Filed March 6, 1941 3 Sheets-Sheet 1 "IIIIIIIIIIIIIIIIIII 23 I Lgi IIIIIIIIIIIIIIIF V Attorney Jan. 13, 1942.

D. J. PARKER METAL SHEARING DEVICE Filed March 6, 1941 s Sheets-Sheet sInventor a In'e/ J 7 4 i-ler @Mmh I Att orney Patented Jan. 13, 1942UNITED STATES PATENT OFFICE METAL G DEVICE Daniel. J. Parker, mag nta;Application March 6, 1941, Serial No. 382,06l

2 Claims. (Cl.164-56) This invention relates to' new and usefulimprovements in metal cutting apparatus and more particularly to adevice for cutting metal strips, plates and like work as well asshearing bolts.

The principal object of the present invention is to provide a simple andinexpensive metal cutting device operated by hydraulic pressure.

Another important object of the invention is to provide a simple andinexpensive hydraulically operated metal cutting device which can beoperated with but little manual effort.

Other objects and advantages of the invention will become apparent tothe reader of the following specification.

In the drawings:

Figure 1 represents a side elevational View of the apparatus.

Figure 2 is a vertical sectional View through the cutter unit.

Figure 3 is a top plan View of the structure shown in Figure 2.

Figure 4 is a vertical sectional view taken substantially on the line 44of Figure 2.

Figure 5 is a horizontal sectional view taken substantially on the line5--5 of Figure 1.

Figure 6 is a perspective View of a spacially shaped collar blade.

Referring to the drawings wherein like numerals designate like parts, itcan be seen that the cutter unit generally referred to by numeral 5consists of a frame made up of a base member '6, a bridge member I, anend member 8 integrally connecting one end of the base 6 with the bridgemember 1, and a swingable end member 9. The end member 9 is hingedlyconnected as at It to the remaining end of the base member 6 and has anopening II at the upper end portion thereof for receiving the reducedfree end portion l2 of the bridge member 7. A retaining screw 13 isfeedable through the upper portion of the swingable end member 9 and maybe operated by a knob or the like M at the upper end thereof to screwthe retaining screw I 3 against the said reduced end portion l2 of thebridge member I to prevent outward swinging of the end member 9.

The fixed end member 8 has a guide groove l5 at the inner side thereofand the swingable end member 9 has a like guide groove it. These guidegrooves serve to receive the reduced end portions I1 and 18,respectively, of a follower l9 which has an internally threaded socket20 at the intermediate portion thereof. This follower l9 has a dependingflange 2! to which a blade 22 is attached by screws 23.

An internally threaded boss 24 is provided at the intermediate portionof the bridge member i, rising from the top of the bridge member I andthis boss receives the lower externally threaded end portion of acylinder 25 in which an elongated plunger 26 operates. This plunger 2tis operative through an opening ll in the bridge member I and has itslower end threaded as at 28 for disposition in the internally threadedsocket 20. Thus the follower I9 is carried by the plunger 25 and theplunger 26 operates within the hydraulic cylinder 25. A cap 29 isprovided for the upper end of the cylinder 25 and from this end portionof the cylinder 25 a conduit or tube 3?] extends to a conventionalhydraulic pump 3! which has a manual operating lever 32. Anyconventional type of hydraulic pump having the proper capacity will befound suitable for use in conjunction with the unit 5. The member whichcarries the blade 22 can be raised in any suitable manner, after thefluid in the top of the cylinder 25 has been returned to the hydraulicpump 3!, such as by lifting the member by hand or by a crow bar or anyother suitable means.

As is shown in Figure 4, a flange 33 rises from the base member 6 and abeveled blade 34 is attached thereto by screws or the like 35.

In the operation of the device, the lever 32 of the pump 31 is operated.Hydraulic pressure occurs in the cylinder 25, forcing the plunger 26downwardly with considerable force, for shearing off bars, strips ofmetal and various other metallic work.

For shearing off bolts from flat faced work, it may be desirable to useblades such as are shown in Figure 6. This blade which is generallyreferred to by numeral 36 consists of an elongated member 31 having alaterally offset portion 38 and a depending blade edge 39. This offsettype of blade can be used on the flanges 2| and 33 so as to permitavoidance of the follower I9 and flange 33 by the flat faced work onwhich the bolts are to be sheared.

Obviously, the end member 9 can be swung downwardly to permit certainwork such as rings, rims and the like to be partly inserted into theframe.

While the foregoing specification sets forth the invention in specificterms, it is to be understood that numerous changes in the shape, sizeand materials may be resorted to without departing from the spirit andscope of the invention as claimed hereinafter.

Having described the invention, what is claimed as new is:

1. A cutting device of the class described comprising a base member, astationary knife on said base member, a top member, a verticallyarranged end member connecting one end of the base member to one end ofthe top member and said end member having a longitudinally extendingguide groove on its irmer edge, a second end member pivotally connectedat its lower end to the opposite end of the base member, means fordetachably connecting the upper end of the second end member to theopposite end of the top member, said second end member having alongitudinally extending guide groove in its inner edge, a knifecarrying member having its ends entering said grooves, a plungerconnected with the knife carrying member and passing through a hole inthe top member, an upright cylinder carried by the top member andreceiving the plunger and means for introducing top member, meansassociated with the plunger for forcing the same downwardly and a knifeconnected with the follower and having a flange fastened to thefollower, 8i downwardly and outwardly sloping intermediate portionconnected with the flange and a depending part connected with the outeredge of the intermediate portion and terminating in a beveled edge.

DANIEL J. PARKER.

